Sizes of successive increasing gaps between 3-smooth numbers.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =12a(6) =15a(7) =20a(8) =30a(9) =32a(10) =36a(11) =60a(12) =64a(13) =72a(14) =81a(15) =96a(16) =108a(17) =128a(18) =144a(19) =162a(20) =192a(21) =216a(22) =288a(23) =324a(24) =384a(25) =432a(26) =576a(27) =648a(28) =864a(29) =1152